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C2 adjective /ˈpɛkəbl/

peccable

有罪的
Meaning
liable to sin or error; capable of doing wrong
Example
Humans are peccable, but they strive for goodness.
人类是有罪的，但他们努力向善。
C2 verb /ˈpælpɪˌteɪt/

palpitate

快速跳动
Meaning
to beat rapidly and strongly, often because of fear, excitement, or illness
Example
Her heart began to palpitate with fear.
她的心脏因恐惧开始剧烈跳动。
C2 noun /ˈsɪmpəltən/

simpleton

傻瓜
Meaning
a foolish or gullible person
Example
They treated him like a simpleton who could not understand anything complex.
他们把他当作一个无法理解复杂事物的傻瓜对待。
C2 noun /ˈæpədʒiː/

apogee

顶点
Meaning
the highest or most distant point; the climax or peak of something
Example
The empire reached its apogee during the 18th century.
帝国在18世纪达到了它的顶点。
C2 noun /ˈfɪli/

filly

小母马
Meaning
a young female horse
Example
The filly ran swiftly across the meadow.
这匹小母马在草地上跑得很快。
C2 adjective /ˈæb.ə.rənt/

aberrant

异常
Meaning
deviating from what is normal or expected; abnormal
Example
His aberrant behavior shocked everyone at the meeting.
他的异常行为让会议上的每个人都感到震惊。
C2 noun /ˈlæsɪtjuːd/

lassitude

疲劳
Meaning
a state of physical or mental weariness; lack of energy
Example
After the long hike, a feeling of lassitude swept over the group.
长时间徒步后，疲劳感笼罩了整个团队。
C2 adjective /ˌʌnprəˈpɪʃəs/

unpropitious

不利
Meaning
Not giving or indicating a good chance of success; unfavorable.
Example
The team began their journey under unpropitious weather conditions.
团队在不利的天气条件下开始了他们的旅程。
C2 verb /ˈtrʌk.əl/

truckle

屈服
Meaning
To submit or yield obsequiously to someone in power.
Example
He refused to truckle to the demands of the corrupt officials.
他拒绝屈服于腐败官员的要求。
C2 verb /kɒnˈkætəneɪt/

concatenate

连接
Meaning
To link things together in a series or chain.
Example
The program concatenates two strings into one.
程序将两个字符串连接为一个。
C2 noun /ˈkwaɪəˌtuːd/

quietude

宁静
Meaning
A state of stillness and tranquility.
Example
She enjoys the quietude of the countryside.
她享受乡村的宁静。
C2 adjective /laɪˈsɛnʃəs/

licentious

放荡不羁
Meaning
Lacking moral restraint; disregarding accepted rules of conduct.
Example
The novel was criticized for its licentious themes.
这部小说因其放荡不羁的主题而受到批评。
C2 noun /ˈmæntl̩/

mantel

壁炉上的架子
Meaning
A shelf above a fireplace, often used for decoration.
Example
She placed family photos on the mantel above the fireplace.
她把家庭照片放在壁炉上的架子上。
C2 noun /ˈlændˌhoʊl.dər/

landholder

土地所有者
Meaning
a person who owns land, especially in large amounts
Example
The landholder leased part of his property to local farmers.
土地所有者将部分财产租给了当地的农民。
C2 adjective /dʒoʊˈkoʊs/

jocose

幽默的
Meaning
playful or humorous in speech or behavior
Example
The professor’s jocose remarks kept the class entertained.
教授的幽默评论让班级感到娱乐。
C2 noun /ˈbɛnɪfɪs/

benefice

教会职务
Meaning
a permanent church appointment for which property and income are provided
Example
The bishop appointed him to a wealthy benefice.
主教任命他为一个富有的教会职务。
C2 adjective /ˈɪnfəntaɪl/

infantile

婴儿式
Meaning
characteristic of an infant; childish
Example
His infantile behavior embarrassed everyone at the meeting.
他那种婴儿式的行为让会议上的每个人都感到尴尬。
C2 verb /ˌweɪˈleɪ/

waylay

突然拦住 / 攻击
Meaning
to stop or interrupt someone unexpectedly, often to attack or detain them
Example
He was waylaid by reporters as he left the courthouse.
当他离开法院时，被记者拦住了。
C2 adjective /əˈkɪliən/

achillean

阿基里斯式
Meaning
like or characteristic of Achilles; strong but vulnerable
Example
His achillean pride made him blind to danger.
他的阿基里斯式骄傲让他对危险视而不见。
C2 noun /ˈæntɪˌtʃeɪmbər/

antechamber

前厅
Meaning
a small room serving as an entry to a larger one
Example
The guests waited in the antechamber before being admitted to the hall.
客人们在进入大厅之前，先在前厅等待。
C2 noun /ɪnˈtɛɡ.jʊ.mənt/

integument

外部覆盖物
Meaning
A natural outer covering, such as skin, shell, or rind.
Example
The snake sheds its integument as it grows.
蛇在生长过程中脱掉外部覆盖物。
C2 noun /meɪs/

Mase

肉豆蔻花
Meaning
spice obtained from the reddish seed covering of the nutmeg seed
Example
A pinch of mace adds warmth to the dessert.
一撮肉豆蔻花加热了甜点。
C2 noun, verb /ˌpæm.fləˈtɪər/

pamphleteer

小册子作者
Meaning
a person who writes or distributes pamphlets, often to promote a political or social cause
Example
In the 18th century, many pamphleteers influenced public opinion.
18世纪，许多小册子作者影响了公众舆论。
C2 noun /mælˈfiːzəns/

malfeasance

公职人员的不当行为
Meaning
Wrongdoing or misconduct, especially by a public official.
Example
The mayor was accused of malfeasance in office.
市长因在职务中不当行为而被指控。
C2 noun /kɪˈrɒpədɪst/

chiropodist

足病医生
Meaning
A healthcare professional who diagnoses and treats foot problems.
Example
The chiropodist treated her painful corns and calluses.
足病医生治疗了她痛苦的鸡眼和老茧。
C2 adjective /ˈfiːtɪd/

foetid

恶臭的
Meaning
having an offensive, unpleasant smell
Example
The foetid smell from the garbage made it hard to breathe.
垃圾散发出的恶臭使得呼吸变得困难。
C2 noun /traɪˈʌmvɪrət/

triumvirate

三头政治
Meaning
A political regime ruled or dominated by three powerful individuals.
Example
The Roman Republic was once governed by a triumvirate.
罗马共和国曾一度由三头政治治理。
C2 noun /ˈsuːpsɒ̃/

soupcon

少量
Meaning
a very small quantity of something; a trace
Example
She added just a soupcon of spice to the dish.
她在菜肴中只加了一点香料。
C2 adjective /spraɪ/

spry

灵活
Meaning
active and lively, especially in old age
Example
The spry grandmother surprised everyone with her quick dance steps.
灵活的奶奶用快速的舞步让所有人都惊讶不已。
C2 adjective /ˈpjʊəraɪl/

puerile

幼稚的
Meaning
childishly silly or immature
Example
His puerile jokes annoyed the audience.
他的幼稚笑话让观众感到烦恼。
C2 noun /ˈɛpɪɡræm/

epigram

警句
Meaning
A short, witty saying or poem that expresses an idea in a clever way.
Example
Oscar Wilde was famous for his sharp epigrams.
奥斯卡·王尔德因其犀利的警句而闻名。
C2 noun /ˈɪmpjʊdəns/

impudence

无礼
Meaning
Rude and disrespectful behavior.
Example
The student's impudence shocked the entire class.
学生的无礼行为让全班震惊。
C2 noun /ˈɡræn.juːl/

granule

颗粒
Meaning
A small compact particle of a substance.
Example
Each granule of salt sparkled under the sunlight.
每一颗盐粒在阳光下闪烁。
C2 adjective /mæɡˈnɪləkwənt/

magniloquent

夸张的语言
Meaning
using high-flown or pompous language
Example
The politician’s magniloquent speech impressed the crowd.
政治家的夸张演讲给人们留下了深刻的印象。
C2 noun /ˌlaɪ.pəˈdʒen.ɪ.sɪs/

lipogenesis

脂肪生成
Meaning
The metabolic process of fat synthesis where excess carbohydrates are converted into fatty acids and stored as triglycerides.
Example
Excess carbohydrate intake promotes lipogenesis and fat storage.
过多的碳水化合物摄入促进了脂肪生成和脂肪储存。
C2 noun /ˈkɒksweɪn/

coxswain

舵手
Meaning
the person in charge of navigating and steering a boat, especially a racing or small boat
Example
The coxswain shouted instructions to the rowing team.
舵手向划船队发出了指令。
C2 noun /ˈæn.ə.lɪst/

annalist

编年史家
Meaning
A person who writes annals or records events year by year.
Example
The annalist carefully documented the events of the king's reign.
编年史家仔细记录了国王统治时期的事件。
C2 adjective /ˌdaɪəˈkrɪtɪkəl/

diacritical

变音符号
Meaning
Relating to a mark added to a letter to indicate a different pronunciation or stress.
Example
The word résumé has diacritical marks that change its meaning from resume.
‘简历’一词有变音符号，它改变了‘简历’的意思。
C2 adjective /ˈneb.jə.ləs/

Nebulous

模糊的; 不明确的; 朦胧的
Meaning
vague or unclear; lacking definite form; hazy
Example
His plans for the future remain nebulous and unclear.
他的未来计划仍然模糊不清。
C2 noun /ˈbroʊmaɪd/

bromide

陈词滥调
Meaning
A trite or unoriginal idea or remark; also a chemical compound of bromine.
Example
His speech was full of old bromides about hard work.
他的演讲充满了关于努力工作的老生常谈。
C2 adjective /ˈfʌndʒəbl/

fungible

可替代的
Meaning
interchangeable; able to replace or be replaced by another identical item
Example
In finance, money is considered a fungible asset.
在金融领域，钱被视为一种可替代资产。
C2 verb /ˌnɒnˈplʌst/

nonplused

困惑的
Meaning
Past tense of nonplus; surprised and confused.
Example
She was completely nonplused by his sudden decision.
她完全被他突如其来的决定弄得不知所措。
C2 noun /sneɪk ɡɔːrd/

Snake gourd

蛇瓜
Meaning
a long, curved vegetable that resembles a snake, commonly used in South Asian cuisine
Example
The snake gourd grows in a twisted, serpentine shape in the garden.
蛇瓜在花园里以弯曲的蛇形生长。
C2 verb /ˌfɔːrɔːrˈdeɪn/

foreordain

预定
Meaning
to determine or decree something in advance; to predestine
Example
Some believe that our lives are foreordained by fate.
一些人相信我们的生活是命运预定的。
C2 noun /ˌɪn.strəˈmɛn.təl.ɪst/

instrumentalist

乐器演奏者
Meaning
A person who plays a musical instrument.
Example
The instrumentalist played a beautiful solo on the violin.
乐器演奏者在小提琴上演奏了一首美丽的独奏曲。
C2 noun /ˈdʒes.tər/

Jester

小丑; 愚人
Meaning
a professional joker or fool at a medieval court; someone who jokes a lot
Example
The court jester entertained the king with witty remarks and amusing tricks.
宫廷小丑用机智的评论和有趣的把戏娱乐国王。
C2 adjective /ˈmoʊtaɪl/

motile

可动的
Meaning
Capable of movement or locomotion.
Example
Certain bacteria are motile and can swim toward nutrients.
某些细菌是可动的，能够朝营养物质游动。
C2 verb /ˌæd ˈlɪb/

ad-lib

即兴
Meaning
to speak or perform without preparation; to improvise
Example
The comedian ad-libbed a joke when the microphone failed.
喜剧演员在麦克风故障时即兴编了一个笑话。
C2 verb /bɪˈweɪl/

bewail

哀叹
Meaning
to express deep sorrow or regret over something; to mourn openly
Example
She bewailed the loss of her childhood home.
她哀叹失去了童年的家。
C2 noun /pɪˈnɒlədʒi/

penology

监狱学
Meaning
The study of prison management and criminal rehabilitation.
Example
He decided to specialize in penology to help improve the prison system.
他决定专攻监狱学，以帮助改善监狱系统。
C2 noun /ˈlɔːrdlɪŋ/

lordling

小领主
Meaning
A young or petty lord; someone of minor nobility.
Example
The arrogant lordling demanded respect despite his lack of experience.
那个傲慢的小领主尽管缺乏经验，仍要求尊重。
C2 noun brəˈvɑː.dəʊ

bravado

虚假的勇气或信心
Meaning
Show of courage or confidence that is not real.
Example
His bravado masked his nervousness before the performance.
他的虚张声势掩盖了他在表演前的紧张情绪。
C2 verb /kənˈtɔːrt/

contort

扭曲
Meaning
to twist or bend out of the normal shape
Example
She contorted her face in pain after the injury.
受伤后，她痛苦地扭曲了脸。
C2 noun /ˈhɑː.mə.li/

Homily

布道; 乏味的道德讲座
Meaning
a religious discourse delivered as part of a church service; a tedious moralizing lecture
Example
The priest delivered an inspiring homily about compassion and forgiveness during Sunday service.
牧师在星期天的礼拜中发表了关于同情和宽恕的鼓舞人心的布道。
C2 noun /ˌɪn.trəˈɡreʃ.ən/

introgression

基因引入
Meaning
The transfer of genetic information from one species to another through repeated backcrossing.
Example
Introgression plays a significant role in plant breeding.
基因引入在植物育种中起着重要作用。
C2 adjective /ˈdjuːtiəbl/

dutiable

需缴关税
Meaning
subject to customs duty or tax
Example
Imported electronics are often dutiable at the border.
进口电子产品在边境通常需缴纳关税。
C2 noun /ˌfoʊ.mənˈteɪ.ʃən/

fomentation

煽动，激起
Meaning
The action of instigating or stirring up; also the application of warm substances to the body to ease pain.
Example
His speech led to the fomentation of violence in the region.
他的演讲导致了该地区暴力的激化。
C2 noun /ˌvɪvɪˈsɛkʃən/

vivisection

在活体动物上进行手术以进行科学研究的实践
Meaning
the practice of performing operations on live animals for scientific research
Example
Vivisection has long been a controversial topic among scientists and animal rights activists.
活体解剖长期以来一直是科学家和动物权利活动家之间的一个争议话题。
C2 adjective /səˈræfɪk/

seraphic

天使般的
Meaning
Of or like a seraph; angelic, pure, and blissful.
Example
She gave him a seraphic smile that calmed his fears.
她给了他一个天使般的微笑，安抚了他的恐惧。
C2 noun /ˈpæn.θi.ɪ.zəm/

pantheism

泛神论
Meaning
The belief that God and the universe are identical, or that everything is a manifestation of God.
Example
Spinoza’s philosophy is often associated with pantheism.
斯宾诺莎的哲学常与泛神论相关联。
C2 adjective /ˈkɔːpjʊlənt/

corpulent

肥胖的, 胖
Meaning
fat or obese; having a large bulky body
Example
The corpulent man struggled to fit into the small chair.
那个肥胖的男人努力地坐进了小椅子。
C2 noun /ˈheɪ.deɪ/

Hey day

黄金时期; 最辉煌的时刻; 顶峰时期
Meaning
the period of a person's or thing's greatest success, popularity, or vigor; prime time
Example
During her heyday as a singer, she performed in sold-out concerts around the world.
在她作为歌手的黄金时期，她在全球的售罄音乐会上表演。
C2 adjective /ˌɪrɪˈmiːdiəbl̩/

irremediable

无法修复的
Meaning
Impossible to cure, repair, or remedy.
Example
The damage to the ancient manuscript was irremediable.
古老手稿的损坏是无法修复的。
C2 noun /ˈkɔːrnɪs/

cornice

檐口
Meaning
an ornamental molding around the wall of a room just below the ceiling
Example
The elegant cornice added a classical touch to the living room.
优雅的檐口为客厅增添了一份古典的气息。
C2 verb /ˈekspərˌɡeɪt/

expurgate

删改
Meaning
To remove offensive or objectionable parts from a text or speech.
Example
The publisher decided to expurgate the novel before reprinting it.
出版社决定在再版前删改这部小说。
C2 adjective /ˌpɛrɪpəˈtɛtɪk/

peripatetic

流浪者
Meaning
Traveling from place to place, especially for work or based on lifestyle.
Example
He led a peripatetic life as a traveling teacher.
他作为一名旅行教师过着流动的生活。
C2 noun /ˈɛərəˌstæt/

aerostat

气球艇
Meaning
A lighter-than-air craft, such as a balloon, that is lifted by gas.
Example
The military used an aerostat for surveillance over the border.
军方使用了气球艇进行边境监视。
C2 adjective /əˈsɛt.ɪk/

ascetic

苦行
Meaning
Practicing strict self-denial and abstaining from worldly pleasures, often for religious reasons.
Example
He lived an ascetic life in the mountains, far from worldly comforts.
他在山区过着苦行生活，远离世俗的安逸。
C2 adjective /ˌmɔːrɡəˈnætɪk/

morganatic

摩根婚姻
Meaning
relating to a marriage in which one partner, usually of lower social rank, does not share the titles or privileges of the other
Example
The prince entered into a morganatic marriage with a commoner.
王子与一名平民结婚，成为摩根婚姻。
C2 noun /ˈʃɑːrlətən/

charlatan

江湖郎中
Meaning
a person who pretends to have knowledge or skills that they do not really possess; a fraud
Example
The so-called healer was exposed as a charlatan.
那位自称为治愈者的人被揭露为一个江湖郎中。
C2 adjective /ˈɡɔːdi/

gaudy

花哨
Meaning
excessively showy or flashy, often in a tasteless way
Example
She wore a gaudy necklace that clashed with her elegant dress.
她戴着一条花哨的项链，与她优雅的裙子格格不入。
C2 verb /ˈɒsɪfaɪ/

ossify

骨化
Meaning
to turn into bone or become rigid and inflexible
Example
With age, some tissues tend to ossify.
随着年龄的增长，一些组织会变得僵硬。
C2 adjective /ˌhaɪpərˈbɔːriən/

hyperborean

极北的
Meaning
Relating to the extreme north; very cold or frigid.
Example
The explorers prepared for the hyperborean climate of the Arctic.
探险者为北极的极北气候做准备。
C2 adjective /ˈvɛndɪbəl/

vendible

可销售的
Meaning
Capable of being sold; marketable.
Example
Only vendible products were displayed at the trade fair.
只有可销售的产品在贸易展会上展示。
C2 noun /ˌɒpəˈrɛtə/

operetta

轻歌剧
Meaning
a short opera with light and humorous themes
Example
The theater staged a famous operetta by Gilbert and Sullivan.
剧院上演了吉尔伯特与沙利文的著名轻歌剧。
C2 verb /əˈvʌls/

avulse

撕裂
Meaning
to tear away or separate forcibly, especially in medical or geological contexts
Example
The surgeon had to avulse the damaged tissue during the operation.
外科医生在手术中必须把受损的组织撕裂。
C2 adjective /daɪˈvɜːrtɪbəl/

divertible

可转移的
Meaning
capable of being turned aside or redirected
Example
Funds from the budget are not legally divertible.
预算中的资金无法合法地转移。
C2 noun /ˌpraɪvəˈtɪə/

privateer

私人战舰
Meaning
A privately owned armed ship authorized by a government to attack enemy ships during war.
Example
The privateer captured several enemy vessels during the conflict.
在冲突中，私人战舰俘获了多个敌方船只。
C2 noun /ˈɛpənɪm/

eponym

以某人命名的事物
Meaning
A person after whom a discovery, invention, place, or other thing is named.
Example
Sandwich is an eponym named after the Earl of Sandwich.
三明治是一个以三明治伯爵命名的伊波宁。
C2 noun /ɔːˈreɪʃən/

oration

演讲
Meaning
A formal speech, especially one given on a ceremonial occasion
Example
The president delivered an inspiring oration.
总统发表了鼓舞人心的演讲。
C2 adjective /ɪnˈɛstɪməbl/

inestimable

无法估量的
Meaning
Too great or valuable to be measured or estimated.
Example
Her contribution to the project was of inestimable value.
她对项目的贡献具有无法估量的价值。
C2 verb (archaic/rare) /rɛk/

reck

在乎
Meaning
To care about or be concerned with (something); to have regard for.
Example
He does not reck the dangers of his actions.
他不在乎自己行为的危险。
C2 verb /ˈblʌdʒən/

bludgeon

用重物打击
Meaning
to hit someone with a heavy object; to force someone into doing something
Example
The guard was bludgeoned by the attacker in the alley.
警卫被小巷中的袭击者用重物打击。
C2 adjective /ˈsɜːrkəmskraɪbd/

circumscribed

受限的
Meaning
restricted or limited in scope or freedom
Example
Her freedom of choice was circumscribed by social rules.
她的选择自由受社会规则的限制。
C2 noun /ˈbreɪziər/

Brazier

黄铜工人
Meaning
a worker in brass; a portable container for burning charcoal or coal
Example
The brazier crafted beautiful brass ornaments.
这个黄铜工人制作了美丽的黄铜饰品。
C2 noun /ˈɒbsɪkwi/

obsequy

葬礼仪式
Meaning
A funeral rite, usually used in plural form obsequies.
Example
The village gathered for the obsequy of their beloved teacher.
村庄聚集在一起，参加他们心爱的老师的葬礼。
C2 verb /ˈbɜːrnɪʃ/

burnish

Meaning
To polish something by rubbing; to enhance or improve.
Example
He burnished the old table until it shone.
C2 noun /kəˈrɒn.də/

Karonda

卡龙达果
Meaning
a small dark purple berry-like fruit that is sour and used in pickles
Example
Karonda is often used to make pickles and preserves.
卡龙达常用于制作腌菜和果酱。
C2 noun /ˈlæɡ.ərd/

Laggard

进展缓慢并落后于其他人的人
Meaning
a person who makes slow progress and falls behind others; someone who is slow to act
Example
The laggard student finally submitted his assignment after the deadline.
那位落后的学生终于在截止日期后提交了作业。
C2 adverb /əˈmʌk/

amok

失控
Meaning
Behaving uncontrollably and disruptively.
Example
The angry mob ran amok after the verdict was announced.
愤怒的人群在裁决宣布后失控地奔跑。
C2 noun /ˈtɛsteɪtər/

testator

立遗嘱人
Meaning
a person who has made a will
Example
The lawyer read the will of the deceased testator.
律师朗读了已故立遗嘱人的遗嘱。
C2 noun juːˈbɪkwɪti

ubiquity

普遍性
Meaning
The fact of appearing everywhere or of being very common.
Example
The ubiquity of smartphones has transformed communication.
智能手机的普遍性改变了通信方式。
C2 noun /juːˈdʒen.ɪks/

eugenics

优生学
Meaning
the study or practice of improving the genetic quality of the human population
Example
Eugenics has been criticized for its unethical applications in history.
优生学因其在历史上的不道德应用而受到批评。
C2 adjective /ˈlæk.rɪ.moʊs/

lachrymose

流泪的，悲伤的
Meaning
tearful or given to weeping; sad and mournful
Example
The movie's lachrymose ending left the audience in tears.
电影的悲伤结局让观众泪流满面。
C2 verb /əˈkuːtər/

accouter

装备
Meaning
to equip or outfit, typically with military or ceremonial attire
Example
The soldiers were accoutered in full battle gear.
士兵们穿戴着全套战斗装备。
C2 verb /ˈɔːɡər/

augur

预示
Meaning
To be a sign of something to come; to predict or foretell.
Example
Dark clouds augur a coming storm.
乌云预示着即将来临的风暴。
C2 noun /ˌsɒ̃ˈfrwɑː/

sangfroid

冷静
Meaning
Composure or coolness under pressure.
Example
She impressed everyone with her sangfroid during the interview.
她在面试中以冷静给大家留下了深刻印象。
C2 adverb /ˌfɔːrθˈwɪθ/

Forthwith

立即; 无延迟; 马上
Meaning
immediately; without delay; at once
Example
The manager ordered the employee to stop the unsafe practice forthwith.
经理命令员工立即停止危险的做法。
C2 noun /ˌiː.tiˈɒ.lə.dʒi/

etiology

病因学
Meaning
the cause or origin of a disease or condition
Example
Doctors are studying the etiology of the new virus.
医生们正在研究新病毒的病因学。
C2 adjective /ˈhaɪˌbraʊ/

highbrow

知识分子
Meaning
intellectually superior or cultured; often describing art, literature, or activities appealing to intellectual tastes
Example
The museum is known for its highbrow exhibitions.
该博物馆以其知识分子展览而闻名。
C2 noun /ˈpʌndʒənsi/

pungency

辛辣
Meaning
The quality of having a strong, sharp taste or smell.
Example
The pungency of garlic filled the kitchen.
大蒜的辛辣味充满了厨房。
C2 adjective /ɔːˈrɔːrəl/

auroral

与极光相关
Meaning
Relating to or resembling the aurora, especially the northern lights.
Example
The scientists observed auroral activity in the night sky.
科学家们在夜空中观察到了欧若拉活动。
C2 noun /aɪˈoʊtə/

iota

极小的数量
Meaning
An extremely small amount.
Example
He did not show an iota of fear.
他一点儿恐惧都没表现出来。
C2 noun /ɪˌdʒækjʊˈleɪʃən/

ejaculation

射精 / 突然的呼喊
Meaning
The action of suddenly saying something or the release of semen during sexual climax.
Example
His sudden ejaculation of joy surprised everyone in the room.
他突然的欢乐射精让房间里的每个人都感到惊讶。
C2 adjective /ˈdæpər/

dapper

整洁而时尚
Meaning
Neat, stylish, and well-dressed in appearance.
Example
He looked very dapper in his new suit.
他穿着新西装看起来非常整洁和时尚。
C2 adjective /ˈvækjuəs/

vacuous

空洞
Meaning
Having or showing a lack of thought or intelligence; mindless.
Example
She gave a vacuous smile during the serious discussion.
她在严肃的讨论中露出了空洞的笑容。
C2 noun ˌsaɪ.bəˈnet.ɪks

cybernetics

控制论
Meaning
The science of communications and automatic control systems in both machines and living things.
Example
Cybernetics plays a crucial role in artificial intelligence.
控制论在人工智能中起着至关重要的作用。
C2 adjective /ɪnˈsɪpɪd/

insipid

乏味的
Meaning
lacking flavor, interest, or excitement; dull
Example
The soup was insipid and needed more seasoning.
汤无味，需要更多的调料。
C2 noun /ˈsʌbtrəˌhɛnd/

subtrahend

被减数
Meaning
a number that is to be subtracted from another number
Example
In the equation 10 - 4, the number 4 is the subtrahend.
在等式 10 - 4 中，数字 4 是被减数。
C2 verb /ˈpʌlvəraɪz/

pulverize

粉碎
Meaning
To crush or grind something into a fine powder; to completely defeat or destroy.
Example
The machine can pulverize stones into dust.
机器可以将石头粉碎成灰尘。
C2 noun /ˌprɒdɪˈɡæləti/

prodigality

挥霍
Meaning
the quality of being wastefully extravagant
Example
His prodigality with money left him bankrupt.
他对金钱的挥霍让他破产。
C2 adjective /ˌdaɪəˈtɒmɪk/

diatomic

双原子
Meaning
Consisting of two atoms.
Example
Oxygen is a diatomic molecule.
氧气是双原子分子。
C2 adverb /bɪˈtaɪmz/

betimes

早早
Meaning
early; in good time
Example
She rose betimes to finish her work.
她早起以完成工作。
C2 adjective /ˈdɛndrɔɪd/

dendroid

树状的
Meaning
tree-shaped or branching like a tree
Example
The coral has a dendroid structure.
珊瑚有一个树状结构。
C2 noun /əˈfeɪ.ʒə/

aphasia

Meaning
a medical condition that causes loss of ability to speak or understand language
Example
After the stroke, she was diagnosed with aphasia.
C2 noun /ˈnoʊmənˌkleɪtʃər/

nomenclature

命名法
Meaning
A system of names or terms used in a particular science, art, or field.
Example
The chemical nomenclature can be difficult for beginners to understand.
化学命名法对初学者来说可能很难理解。
C2 adjective /rɪˈfʌldʒənt/

refulgent

辉煌
Meaning
Shining brightly; radiant.
Example
The refulgent sun lit up the entire valley.
闪亮的太阳照亮了整个山谷。
C2 noun /dɪˈsɛmbələr/

dissembler

伪君子
Meaning
a person who conceals their real feelings or intentions; a hypocrite or pretender
Example
The politician was accused of being a dissembler who never revealed his true plans.
那位政治家被指控是一个从不透露自己真实计划的伪君子。
C2 adjective /pruːˈdɛnʃəl/

prudential

审慎的
Meaning
involving or showing prudence, especially in financial or business matters
Example
The bank has set prudential rules to protect depositors.
银行制定了审慎的规则以保护存款人。
C2 noun /ɪnˈkʌmbrəns/

encumbrance

负担 / 障碍
Meaning
a burden or obstacle that makes progress or movement difficult
Example
Debt can become a serious encumbrance in life.
债务可能成为生活中的严重负担。
C2 noun /ˌdɪsəˈvaʊəl/

disavowal

否认
Meaning
the denial of any responsibility, connection, or support
Example
The politician issued a firm disavowal of the controversial remarks.
该政治家对有争议的言论发表了强烈的否认。